中国电机工程学报2026，Vol.46Issue(8)：3346-3355,中插23,11.DOI:10.13334/j.0258-8013.pcsee.242747
来流条件与叶轮几何对S-CO2离心压缩机反转作透平的性能影响
Effect of Inlet Conditions and Impeller Geometries on the Performance of S-CO2 Centrifugal Compressor as Turbine
摘要
Abstract
This paper presents a concept of a supercritical carbon dioxide(S-CO2)bi-directional Brayton cycle energy storage system,in which the turbomachinery needs to have bi-directional operation capability.In order to study the performance characteristics of the turbomachinery under bi-directional operation conditions,this paper takes the centrifugal compressor reversing as turbine as the research object,and carries out the research through the combination of theoretical derivation and numerical calculation method.Firstly,the optimal working conditions of the compressor reverse as turbine are theoretically deduced and analyzed.Secondly,the performance characteristics of the turbine under different inlet conditions are studied by numerical simulation,and the influence law of impeller geometric parameters on the performance of the turbine is discussed.The results show that reducing the inlet temperature and increasing the inlet pressure can broaden the efficient operation range of the turbine.With the increase of flow rate,the turbine efficiency first increases and then decreases.Compared with the compressor condition,the high efficiency operating range of the turbine condition shifts to the low flow rate condition and the range narrows.The maximum efficiency under turbine condition is higher than that under compressor condition.An increase in the number of blades and blade wrap angle can boost output power and expansion ratio,yet excessive increases will lead to a decline in efficiency.The blade tip clearance has a significant effect on efficiency,and the blade wrap angle has the greatest influence on output power and expansion ratio.The research results can provide a theoretical basis and reference for the optimal design of S-CO2 centrifugal compressor as turbine and the realization of reversible compressor.关键词
离心压缩机作透平/超临界二氧化碳/气动性能/来流条件/几何结构Key words
centrifugal compressor as turbine/supercritical carbon dioxide(S-CO2)/aerodynamic performance/inlet condition/geometric structure分类
能源科技引用本文复制引用
苗森春,谭兴兴,吴江波,申正精,杜小泽..来流条件与叶轮几何对S-CO2离心压缩机反转作透平的性能影响[J].中国电机工程学报,2026,46(8):3346-3355,中插23,11.基金项目
甘肃省教育厅"双一流"重点项目(GCJ2022-38) （GCJ2022-38）
甘肃省教育厅高校教师创新基金项目(2026A-030)."Double First-class"Key Program of Gansu Provincial Department of Education(GCJ2022-38) （2026A-030）
Gansu Provincial Department of Education University Teachers'Innovation Fund Project(2026A-030). （2026A-030）
